工厂模式有三个参与者，抽象产品(Product)、工厂(Creator)和具体产品(ConcreteProduct)。客户只会看到工厂和抽象产品。
public interface Product{
public String getName()
}
public class ConcreteProduct implements Product{
public String getName(){
return "产品1"
}
}
public class Creator{
public static Product create1(){
return new ConcreteProduct()
}
}
工厂模式的作用在于将创建具体产品的方法由工厂类控制，客户只需要知道产品的抽象类型
java中工厂模式分为:
简单工厂模式(Simple Factory)
2. 工厂方法模式(Factory Method)
3. 抽象工厂模式(Abstract Factory)
每种方法的实现不同
提供一个简单工厂模式的案例：
public abstract class Woman {
private String mySkill
public String getMySkill() {
return mySkill
}
public Woman() {
//System.out.println("我是女人")
}
public void setMySkill(String mySkill) {
this.mySkill = mySkill
}
}
----------------------------
public class LovelinessWoman extends Woman{
/*
* 可爱型女人
*/
public LovelinessWoman()
{
String mySkill="撒过娇、出过轨、勾引领导下过水"
this.setMySkill(mySkill)
}
}
-----------------------------
public class SteelinessWoman extends Woman{
/*
* 冷酷型女人
*/
public SteelinessWoman()
{
String mySkill="装过神、弄过鬼，跟别人老公亲过嘴"
this.setMySkill(mySkill)
}
}
--------------------------------------
public class WomanMakeFactory {
public Woman findWoman(int typeID) {
switch (typeID) {
case 1:
return new LovelinessWoman()
case 2:
return new VirtuousWoman()
case 3:
return new SteelinessWoman()
default:
return null
}
}
public Woman findWoman(String type) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
/*
* Type t = Type.GetType("SimpleFactory." + type)
* Woman wm =
* (Woman)Activator.CreateInstance(t)return wm
*/
String string="cn.jbit.design.simplefactory."+type
Class c = Class.forName(string)
Woman wm = (Woman) c.newInstance()
return wm
}
}
-------------------------
调用
public class Test2 {
/**
* @param args
* @throws IllegalAccessException
* @throws InstantiationException
* @throws ClassNotFoundException
*/
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
Scanner input=new Scanner(System.in)
boolean sel=false
do {
System.out.println("请选择你要找的女人的类型")
System.out.println("LovelinessWoman：可爱型女人 VirtuousWoman：善良型女人 SteelinessWoman：冷酷型女人")
String typeid=input.next()
WomanMakeFactory factory = new WomanMakeFactory()
Woman wm=factory.findWoman(typeid)
System.out.println("该类型女人的新标准：")
System.out.println(wm.getMySkill())
System.out.println("还想看看别的类型吗？y代表想，n代表再也不想了")
sel=input.next().equals("y")
} while (sel)
}
}
